Oil and grease gun



L. E. WOOD.

OIL AND GREASE GUN.

APPLICATION FILED JUNE 4. I920.

Patented Oct. 11, 1921.

I I I I I T awvcmioz LUE. Zl/ood UNITED- STATES PATENT OFFICE."

.LOUIS E. WOOD, OF IEA.RRIELI', PENNSYLVANIA.

011. AND GREASE GUN.

To all whom it may concern:

Be it known that I, LOUIS E. Woon, a citizen of the United States,residing at Farrell,

to which it in the county of Mercer and State of Pennsylvania, haveinvented certain new and useful Improvements in Oil and Grease Guns; andIv do declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in appertains tomake and use the same. g

This invention relates to an improved oil and grease gun and one objectof the invention is to provide a lubricating guniwhich can be used foroil or grease and which can be easily adjusted to permit the plunger tobe moved through the cylinder by a sliding movement or through thecylinder by a rotary movement after the threads of the plunger have beenen aged by thread engaging plates.

. nother object of the invention is to provide an improved. actuatingelement for moving the thread engaging plates into and out of anoperative position, the actuating element being rotatably mounted andhaving a turning stem or neck which extends through a cap holding theactuating element in place.

Another object of the invention is to so construct thisimproved gun thatthe thread engaging plates and actuating element may be carried by thehead closingthe end of the cylinder.

This invention is illustrated in the accompanylng drawings wherein:

Figure 1 is a View showing the improved gun in sideelevation.

Fig. 2 is a sectional view through the upper portion of the gun takenalong the line 22 of Fig. 1.

Fig. 3 is a transverse sectional view taken along the line 3-3 of Fig.2.

Fig. 4 is a transverse sectional view taken along the line 44 of Fig. 2.

Fig. 5 is a view showing the thread engaging plates in side elevatlon. I

Fig. 6 is a top plan view of the thread engaging plates. 5

'This improved gun is provided with a cylinder or barrel l which is openat its upper and lower ends and at its lower'end carries a head 2 whichforms a discharge nozzle. The upper end of this barrel 1S internallySpecification of Letters Patent.

head and in addition the art to be fed longitudinally.

threaded and is closed by a head 7 which is externally threaded and isprovided intermediate its length with a collar 8, the collar beingmilled to permit easy turning of the to permitting easy Patented Oct.11, 1921. Application filed June 4, 1920. Serial No. 386,555. v

turning of the head limiting movement of the head into the barrel. Thishead is provided with a passage 9 through which a threaded plunger 10slidably passes and this passage 9 has its outer end portion enlarged toprovide a pocket 11 from the depression of seat 12 formed in the head asshown in Fig. 2. It will thus be seen that since the passage 9 isunthreaded and of greater diameter than the threaded stem or plunger 10this plunger may be grasped by the handle 13 and moved longitudinally toreciprocate the piston 10 carried thereby fordischarging the oil orgrease from the barrel.

When discharging heavy grease from the barrel it is desired to have theplunger moved through the barrel at a relatively slow speed and in orderto do so there have been provided plates 14 which are slidably mountedin a groove or seat 15 cutftransverselyin the bottom of the pocket 12and having arcuate necks 16 which extend into the socket 11 and leadinginwardly are internally threaded for engagement with easily and quicklymoved to an operative or inoperative position and in order to do sothere has been provided a disk 17 which fits into the pocket 12 abovethe plates 14 and is provided with arcuate slots 18 cut to provide camslots. Pins 19 extend from the plates 14 into the slots 18 and as thedisk is rotated the action of the cam walls upon the pins will cause theplates to be moved into or out of engagement with the plunger accordingto the direction in which the disk is rotated. This disk is rotatablyheld in engagement with the head 7 by means of a cap 20 which is screwedupon the threaded upper portion of the head and this cap is providedwith a central opening through which extends the neck 21 of the disk, acollar 22 being screwed upon the ex- Y tended upper portion of the neckand milled i the plunger that "the disk can be easily rotated. It willthus be seen that with this improved construction the collar 21 may begrasped and the disk thus rotated to move the plates 17 into or out ofengagement with the plun-v ger. If the plates are in engagement with theplunger must be rotated when moving it longitudinally of the valve andtherefore heavy grease may be readily forced out of the gun and into acrank casing or gear housing. After the heavy grease has been forced outof the barrel and it is desired to return'theplunger to the upper end ofthe barrel for refilling the disk will be rotated to move the platesoutwardly and the plates will then be out of engagement with the plungerand the plunger may be moved 1011- he barrel can then be refilled withheavy grease and the plates again moved tothe operative position or ifit is desired to use the gun for'oil the'plates willbe left in ina Whatis claimed is:

outer countersunk'portion forming a seat extend-' operative position andthe plunger simply pushed inwardly to force the oil through the outletof the head 2.,

'1. A structure of the character an opening slidably receiving theshaft, the open ng having its outer end portion enlarged and the blockbeing cut from its face to provide a pocket having a ing across thebottom of the pocket about sald opening, a cap for said pocket carriedby said block, plates slidably mounted in sides of the shaft andthreaded neck extensions opening for engaging the threaded shaft whenmoved inwardlyto an operative position, and operating means for movingthe tudinally "of the barrel by a direct pull.

I described comprising a threaded shaft, a block having plates into andout of an operative position including an actuating element extendingthrou h the cap.

structure of the character describedcomprising a threaded shaft, 'ablock having an opening slidably receiving the shaft,

the block being cut from its-outer face to cam slots, and pins,extending from said plates through the slots of the disk to impartsliding movement to the plates into and out of operative engagement withthe shaft" when the disk is rotated through the medium of said neck; v3'. A structure of the character described comprising .a threaded shaft,a block having an opening slidably receiving said shaft, the block beingcut from its outer face to provide a pocket, a cap. for said pocketcarried by said block and provided with an opening,

plates slidably mounted in said pocket for movement into and out ofengagement with the threads of the shaft, la disk rotatable in saidpocket and provided with a central neck extension fitting loosely aboutthe shaft and extending through the opening of the cap, and means fortransmitting" sliding movement to the latching plates when said disk isrotated through the medium of neck extension.

lln testimony'whereof have hereunto set my hand.

